Journal
ELECTROCHIMICA ACTA
Volume 227, Issue -, Pages 95-100Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.12.134
Keywords
PEDOT:FTS; Long-term stability; Catalytic site; Iodine/iodide electrolyte; Dye-sensitized Solar Cell
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Funding
- NRF of Korea Grant - Ministry of Science, ICT & Future Planning [2014M3A7B4051747, 2014M3A7B4052200]
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One of the primary obstacles to the commercialization of dye-sengitized solar cells (DSSCs) is the improvement of their long-term stability. Here, we report greatly improved long-term stability of DSSCs, which have PEDOT:FTS polymer as a counter electrode. DSSCs with this PEDOT:FTS film demonstrate slightly lower power conversion efficiency of 8.1% under standard conditions (AM 1.5 G, 100 mWcm(-2)) compared to the similar to 9.1% efficiency of Pt, using an electrolyte with iodine/iodide, which is the most popular redox shuttle. However, we demonstrate that this conducting polymer counter electrode facilitates the fabrication of solar cells with greatly improved long-term stability compared to Pt-based ones after exposure to electrolyte soaking conditions. Various electrochemical analyses were performed to evaluate the enhanced durability of PEDOT:FTS polymer in the highly corrosive iodine/iodide electrolyte under a continuous redox reaction condition. (C) 2016 Elsevier Ltd. All rights reserved.
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